The liquid-phase oxidation of p-methoxytoluene to p-anisaldehyde with Co(OAc)2/Ce(OAc)3/Cr(OAc)3 catalyst.
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概要
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The liquid-phase oxidation of <I>p</I>-methoxy toluene to <I>p</I>-anisaldehyde in the presence of Co based catalysts has been studied. With Co(OAc)<SUB>2</SUB> alone in acetic acid as a solvent, only a trace amount of <I>p</I>-anisaldehyde could be obtained; however, upon the addition of a second metal salt (e.g., Mn(OAc)<SUB>2</SUB> or Ce(OAc)<SUB>3</SUB>) a considerable improvement in the yield (up to 60%) was observed. The synergism of Co and the second component as well as the optimization of the reaction conditions were investigated. Co(OAc)<SUB>2</SUB>–Ce(OAc)<SUB>3</SUB>–Cr(OAc)<SUB>3</SUB> (3:1:2) was finally found to be the most effective catalytic system, which gave a 76% yield of <I>p</I>-anisaldehyde under 3 atm O<SUB>2</SUB> at 110° for 3 h.
- 公益社団法人 日本化学会の論文
著者
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MORO-OKA Yoshihiko
Research Laboratory of Resources Utilization, Tokyo Institute of Technology
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Moro-oka Yoshihiko
Research Laboratory Of Resource Utilization Tokyo Institute Of Technology
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Kitajima Nobumasa
Research Laboratory Of Resources Utilization Tokyo Institute Of Technology
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Taniguchi Masatoshi
Tokushima Research Laboratory, Otsuka Chemical Co., Ltd.
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Akada Mitsuo
Tokushima Research Laboratory, Otsuka Chemical Co., Ltd.
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Sunaga Shigeru
Research Laboratory of Resources Utilization, Tokyo Institute of Technology
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Yoshikuni Tadatsugu
Tokushima Research Laboratory, Otsuka Chemical Co., Ltd.
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Tomotaki Yoshihisa
Tokushima Research Laboratory, Otsuka Chemical Co., Ltd.
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